Guest: George Helou, Executive director of the Infrared Processing and Analysis Center at CalTech, and deputy director of the Spitzer Infrared Telescope Science team. We discussed his scientific research: Space infrared astronomy and galaxies.

Guest: Richard Cyburt, assistant professor at the Joint Institute for Nuclear Astrophysics (JINA) of Michigan State University. We discussed his research on nuclear astrophysics, and how it bridges nuclear physics and astrophysics.